<html><head><title>US air pollution data set</title>
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<table width="100%"><tr><td>usair(gamlss.data)</td><td align="right">R Documentation</td></tr></table><object type="application/x-oleobject" classid="clsid:1e2a7bd0-dab9-11d0-b93a-00c04fc99f9e">
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<h2>US air pollution data set</h2>


<h3>Description</h3>

<p>
US air pollution data set taken from  Hand et al. (1994) data set 26, USAIR.DAT, originally from 
Sokal and Rohlf (1981).
</p>


<h3>Usage</h3>

<pre>data(usair)</pre>


<h3>Format</h3>

<p>
A data frame with 41 observations on the following 7 variables.
<dl>
<dt>y</dt><dd>a numeric vector: sulpher dioxide concentration in air mgs. per cubic metre in 41 cities in the USA</dd>
<dt>x1</dt><dd>a numeric vector: average annual temperature in degrees F</dd>
<dt>x2</dt><dd>a numeric vector: number of manufacturers employing &gt;20 workers</dd>
<dt>x3</dt><dd>a numeric vector: population size in thousands</dd>
<dt>x4</dt><dd>a numeric vector: average annual wind speed in miles per hour</dd>
<dt>x5</dt><dd>a numeric vector: average annual rainfall in inches</dd>
<dt>x6</dt><dd>a numeric vector: average number of days rainfall per year</dd>
</dl>

<h3>Source</h3>

<p>
Hand et al. (1994) data set 26, USAIR.DAT, originally from 
Sokal and Rohlf (1981)
</p>


<h3>References</h3>

<p>
Hand, D. J., Daly, F., Lunn, A. D., McConway, K. J. and Ostrowski, E. (1994),
A handbook of small data sets, Chapman and Hall, London.
</p>


<h3>Examples</h3>

<pre>
data(usair)
str(usair) 
plot(usair)
# a possible gamlss model
# gamlss(library)
#ap&lt;-gamlss(y~cs(x1,2)+x2+x3+cs(x4,2)+x5+cs(x6,3)+x4:x5, 
#               data=usair, family=GA(mu.link="inverse"))
# 
</pre>



<hr><div align="center">[Package <em>gamlss.data</em> version 0.0-2 <a href="00Index.html">Index</a>]</div>

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